1Pet 3, 18-19 Christ also suffered for sins once

(1Pet 3, 18-19) Christ also suffered for sins once
[18] For Christ also suffered for sins once, the righteous for the sake of the unrighteous, that he might lead you to God. Put to death in the flesh, he was brought to life in the spirit. [19] In it he also went to preach to the spirits in prison,

(CCC 632) The frequent New Testament affirmations that Jesus was "raised from the dead" presuppose that the crucified one sojourned in the realm of the dead prior to his resurrection (Acts 3:15; Rom 8:11; 1 Cor 15:20; cf. Heb 13:20). This was the first meaning given in the apostolic preaching to Christ's descent into hell: that Jesus, like all men, experienced death and in his soul joined the others in the realm of the dead. But he descended there as Savior, proclaiming the Good News to the spirits imprisoned there (Cf. 1 Pt 3:18-19). (CCC 1680) All the sacraments, and principally those of Christian initiation, have as their goal the last Passover of the child of God which, through death, leads him into the life of the Kingdom. Then what he confessed in faith and hope will be fulfilled: "I look for the resurrection of the dead, and the life of the world to come" (Niceno-Constantinopolitan Creed). (CCC 1474) The Christian who seeks to purify himself of his sin and to become holy with the help of God's grace is not alone. "The life of each of God's children is joined in Christ and through Christ in a wonderful way to the life of all the other Christian brethren in the supernatural unity of the Mystical Body of Christ, as in a single mystical person" (Indulgentiarum doctrina, 5).